That's close to how I feel as well.. When I look back at my time on drugs and before I started,,, their is probably a lot I regret about it, but truthfully if I had a choice to pick again between whether I did it all the same, or NEVER touched drugs, I would choose drugs again.
For the same reasons as you, where it led me in life and the person I ended up being at the end of it I wouldn't change for anything.
Been in the same boat mate, you have a great way of putting things and I share your sentiments.